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agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 1 description the AA51861 is a single-phase bipolar drive motor d river that easily implements direct pwm motor drive systems with excellent efficiency, the AA51861 is optimal for fan motor drive in personal computer power supply systems and cpu cooling fan systems. features built-in hall bias circuit built-in pwm speed control circuit built-in minimal speed setup circuit rotation speed indication (fg) rotation or lock state indication (rd) built-in thermal shutdown circuit lock protection maximum 1.0a (vcc = 16v) output current appilication cpu cooler fan in pc brushless dc motor driver
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 2 pin description
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 3 (for tssop-20) pin no. pin name function 1 pgnd power ground 2 pgnd power ground 3 pgnd power ground 4 out2 driver output 2 5 vcc power supply 6 rmi minimum duty setting 7 vth adjustable input 8 cpwm oscillator capacitor 9 fg rotation speed indicator 10 rd rotation/lock state indicator 11 vin+ hall sensor input + 12 hb hall sensor bias regulator 13 vin- hall sensor input - 14 6vreg reference voltage regulator 15 ct lock and rotation setting capacitor terminal 16 sgnd ground for control circuit 17 out1 driver output 1 18 pgnd power ground 19 pgnd power ground 20 pgnd power ground
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 4
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 5 (for ssop-16) pin no. pin name function pgnd power ground 1 out2 driver output 2 2 vcc power supply 3 rmi minimum duty setting 4 vth adjustable input 5 cpwm oscillator capacitor 6 fg rotation speed indicator 7 rd rotation/lock state indicator 8 vin+ hall sensor input + 9 hb hall sensor bias regulator 10 vin- hall sensor input - 11 6vreg reference voltage regulator 12 ct lock and rotation setting capacitor terminal 13 sgnd ground for control circuit 14 out1 driver output 1
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 6 block diagram truth table vth in- in+ cpwm ct out1 out2 fg rd mode low high low high low high low low on rotation low high low high off high high low low off low low pwm low high low off off - high low - high high off low off lock low high off high off
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 7 absolute maximum ratings t a = 25c symbol parameter ratings unit vcc .max maximum supply voltage 18 v i out.max maximum output current 1 a v out.max maximum output voltage 18 v i hb.max hb maximum output current 10 ma vth .max vth maximum input voltage 6 v v fg /v rd.max fg/rd maximum output voltage 18 v i fg /i rd.max fg/rd maximum output current 10 ma p d.max power dissipation 1.5 w t stg storage temperature range -55 ~ 150 o c t opr operating temperature range -30 ~ 90 o c recommended ratings t a = 25c symbol parameter ratings unit vcc vcc supply voltage 4.5 ~ 16 v vth vth input level voltage range 0 ~ 9 v vicm hall sensor input common- mode input voltage range 0.2 ~ 3 v
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 8 electrical characteristics t a = 25c, vcc=12v parameter symbol test conditions limits unit min typ max circuit current i cc1 drive mode 12 18 24 ma i cc2 lock mode 5.3 6.7 8 ma 6vreg voltage v 6vreg i 6vreg = 5ma 5.9 6.1 6.3 v hb voltage v hb 1.25 1.4 1.55 v cpwm high-level voltage v crh 3.45 3.6 3.75 v cpwm low-level voltage v crl 1.95 2.05 2.15 v cpwm oscillator frequency f pwm c = 100pf 18 25 32 khz ct high-level voltage v cth 3.58 3.73 3.88 v ct low-level voltage v ctl 1.53 1.68 1.83 v ct charge current i ct1 0.84 1.14 1.44 a ct discharge current i ct2 0.15 0.2 0.25 a ct charge/discharge current ratio r ct 3.4 5.7 9.6 out output low saturation voltage v ol i o = 200ma 0.2 0.3 v out output high saturation voltage v oh i o = 200ma 0.9 1.1 v hall sensor input sensitivity v hn 10 20 mv rd/fg low-level voltage v rdl/fgl 0.2 0.3 v rd/fg pin leakage current i rdl/fgl 30 a
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 9 application circuit hall pgnd rmi vth cpwm fg rd sgnd ct vin- hb vin+ out1 out2 m 6vreg vcc cm
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 10 control timing chart 1. low speed setting mode when vth voltage is higher than rmi pin voltage, mo tor speed is settable by rmi pin voltage. the minimum drive duty cycle is settable by compari ng cpwm oscillating voltage and rmi pin voltage. vth voltage is decided by variation of pwm duty. 2. variable speed setting mode when vth voltage is lower than rmi pin voltage, pwm control system works by comparing vth voltage with cpwm voltage. if vth voltage is hi gher, the on duty cycle of the upper side transistors will be minimized and motor speed becom es lower. 3. full speed rotation mode at a certain pwn duty, when vth voltage is lower th an the low side of cpwm output voltage, the motor will run at full speed.
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 11 ordeing information order no. package packing one reel q?ty mark chart AA51861f tssop20fd tape & reel 2,500ea AA51861h htssop14l tape & reel 2,500ea thermal coefficient package type lead count pad size thermal resistance mm 2 theta ja theta jc tssop20fd 20 pin 3.0 4.2 48.57 22.83 aa 51861 xxxx f aa 51861 xxxx h
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 12 package dimensions sybols dimensions in millimeters dimensions in inch min nom max min nom max a 0.80 - 1.15 0.031 - 0.045 a1 0.00 - 0.10 0.000 - 0.004 a2 0.80 1.00 1.05 0.031 0.039 0.041 b 0.19 - 0.30 0.007 - 0.012 c 0.09 - 0.20 0.004 - 0.008 d 6.40 6.50 6.60 0.252 0.256 0.260 e 6.20 6.40 6.60 0.244 0.252 0.260 e1 4.30 4.40 4.50 0.169 0.173 0.177 e - 0.65 - - 0.026 - l 0.45 0.60 0.75 0.018 0.024 0.030 y - - 0.10 - - 0.004 0 - 8 0 - 8 l1 0.90 1.00 1.10 0.035 0.039 0.043
agamem microelectronics inc. AA51861 preliminary single - phase full - wave fan motor driver ? copyright agamem microelectronics inc. www.agamem.com.tw 2009/9/11 agamem microelectronics incoperation reserves the r ight to make changes without further notice to any products herein to improve reliability, func tion or design. agamem does not assume any liability arising out of the application or use of any products or circuit desribed herein; neither does it convey any license under its patent rights, nor the rights of others. 13 sybols dimensions in millimeters min nom max a - - 1.20 a1 0.05 - 0.15 a2 0.80 0.90 1.05 b 0.19 - 0.30 b1 1.49 - 1.60 c 0.09 - 0.20 d 6.40 6.50 6.60 e1 4.30 4.40 4.50 e 6.40 bsc e 0.65 bsc l1 1.00 ref l 0.50 0.60 0.75 s 0.20 - - 0 - 8

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